Circular acoustogyration effect on gold nanoparticles grown on indium tin oxide

Ivan V. Kityk, Ali Umar Akrajas, Munetaka Oyama

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Gold nanoparticles deposited on indium-tin-oxide coated substrates show substantial circularly polarized acoustically induced light gyration (AILG) at liquid-helium temperature. The effect was observed only during simultaneous treatment by two coherent acoustic waves with basic frequencies of 0.8-1.6 MHz and corresponding coherent double-frequency acoustical components. It was found that increasing the basic acoustical frequency to 1.6 MHz led to suppression of the effect. A Ti:sapphire laser with a pulse duration of approximately 80 fs allowed us to achieve the maximal value for the AILG. Enhancement of the pulse duration higher than 200 fs also substantially diminished the effect. The maximally achieved value of the AILG susceptibility (described by a fourth-order axial tensor) caused by the circularly polarized acoustical probe field at an acoustical power density of approximately 3 W/cm2 at T = 4.2 K was equal to approximately 7.8 deg/mm for the circular acoustical wave polarization. The maximal AILG coefficient is achieved for samples that possess minimal resistivity. The investigated composites possess an acoustically induced helicoidal grating that disappeared 20 s after switching off the acoustical fields.

Original languageEnglish
Pages (from-to)6905-6909
Number of pages5
JournalApplied Optics
Volume44
Issue number32
DOIs
Publication statusPublished - 10 Nov 2005
Externally publishedYes

Fingerprint

gyration
Tin oxides
indium oxides
Indium
tin oxides
Gold
gold
Nanoparticles
nanoparticles
pulse duration
polarization (waves)
Sapphire
liquid helium
Tensors
Helium
radiant flux density
Laser pulses
sapphire
retarding
Acoustic waves

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Circular acoustogyration effect on gold nanoparticles grown on indium tin oxide. / Kityk, Ivan V.; Akrajas, Ali Umar; Oyama, Munetaka.

In: Applied Optics, Vol. 44, No. 32, 10.11.2005, p. 6905-6909.

Research output: Contribution to journalArticle

Kityk, Ivan V. ; Akrajas, Ali Umar ; Oyama, Munetaka. / Circular acoustogyration effect on gold nanoparticles grown on indium tin oxide. In: Applied Optics. 2005 ; Vol. 44, No. 32. pp. 6905-6909.
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